Sash-cord guide



' (No Model.) S. PALMER.

SASH CORD GUIDE.

No. 412.658. Patentd Oct; 8, 1889.

* m uuuuummmmw T UNITED STATES PATENT OFFIC sTEPHEN PALMEaoF LANSINGBURG, NEW YORK.

SASH-CORD GUIDE.

SPECIFCATION forming part of Letters Patent e. 412553, dated October 8, 1889.

- Application filed .Tune 9, 1888. SerialNo. 276,(347. (Ne model.)

To all whom, 't may concern: I j Be it known that I, STEPHENPALMER, o Lansingburg county of Rensselaer, State of New York, have invented anew and useful Improvement in Sash-Pulley' Cases, of which the following is a specification. y 1 My invention relates to sash-pulley cases,

` andgespecially to that class of them which are gio so made as to be adapted to be driven into an .opening produced in the ood by boring two or more anger-holes; and my invention consist-s in forming chisels on the rear or inner 1 i edgesof .the case, and also in the novel const -action and combin ation of parts hereinafter more fully described, and pointed out in the clains.

The most approved forms of pulleycases 3 i now made are adapted to fit' a series of; conjoined anger-holes, some having aface-plate fitting such amortise, and by means of which the case is firnly fastened in the mortise by screws passing through the end projecting parts of the face-plate, while other forms depend on a close contact of the case and mor-` tise walls to hold 'it in place and dispense with the face-plate or attaching-ears.. Those of this type now` in i use are provided with tubular swellingsformed on the sides of the case to fit the auger-holesclosely at all points. This Construction is objectionable on account of the great care and attention to details neci essary in boring the holes forming the mortise, as itis obvious that any deviation in location, alignment, or inclination of r the holes formin, the mortise causes the case to act as t -a wedge spreading and splitting the wood in which the `mortise is made. 'Another objecvtion to cases of these types, and which augproportions ments the difficulties enumerated, is the difficulty found in making them of the desired The requirements in this reu flspect are wheels of maximum diameter and' 1 width and cases requiring mortises of minimum width. This necesitates auger-holesof minimum diameterbored as far into each other i as possible to make the narrowest part of the mortise of s-ufficient yvidth to receive the case; It is -obvious that these conditions make itvery difficult to bore a sufficient number of such holes to receive a case of the rei quired proportions in their proper positions and. perfectly parallel with each other, as in the mortise at its narrow points by cutting away the inwardly-projecting points, butcuts u away any other obstructions that may be caused by imperfect boring. To further provide for possible i'mperfect boring; and to reduce the transverse strain on the walls of the mortise without materially lessening the contact of the case with the mortise-wal1s,1 form on the sides of the case angular swellings, which embed themselves into the mortise-walls at the points of the angles, while there will i be no great transverse strain at other points. i Accompanying this specification, to form a part of it, is a sheet of drawings illustrating my invention, with the same designaton of parte by letter references used in all of them.

Figure l shows a front or face View of my improvement; Fig. 2, a side View; Fig. 3, a cross-section taken on the line sc w of Fig. l, and Fig. 4 a mortise formed by boring connected anger-holes.

The letter b shows the general form of the case inclosed between the dotted and heavy lines in Fig. 1 formed into angular swellings, one form being shown at B and another form at B A is the' pulley, revoluble on spindle or trunnions a.

d is a face-plate, preferably made integral with the case, by means of which the front of the case makes a perfect finish. It is curved on its outer edges to form arcs of circles, which fill and conceal the parts of the mortise not filled by the angular swellings. On the center of each arc are formed projecting points or marking-spurs O, which are for the IOO the entrance of the pulley into the nortise are cut away.

In Fig. 4: are shown by dotted lines points that may be cut away by the chisels D, by means of which the use of a separate chisel is avoided, saving time in the operation, and the cutting away of precisely the required material and a consequent perfect fit of the case in the mortise assured.

To insert this case, the requisite number of holes of the proper diameter are bored at the center-points, (indicated by indentations in the Wood made by the marking-spurs,) after which the case is driven into the mortise thus formed. The chisels on the inner edges of the case, going before, cut away the projcting points left bythe auger-holes and any otherobstructions such as Would result from inperfect boring. The angular swellings, which at their extreme angular points slightly project beyond the outer edge of the face-.plate, are embedded into the mortisewlls, while they are at other points free from contact with the mortise-Walls, except in case of -imperfect boring and where thejchisels on the rear of the case have cut away obstruction and have thus become fitted.

'While -I-ha ve shown and described on e form only of a pulley-case with the rear edges of the case made to perform the function of chisels, I in no wise restrict myself to such particular form, as the form of case may be widely varied without departing from the spirit and scope of my invention, and I am the first to employ this feature in any article adapted to be inserted in a mortise, and it is applicable .to any oblong mechanism-inclosing case, a great variety of which are now in use, and in which it would perform the same functions as I have herein described this specifie form.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, S-,-

1. A sash-pulley case having fol-med on its sides angular swellings, on its rear or inner edges chisels or cutters, and on its front or face edges arcs of circles, each are 'having formed on its outer periphery a markingspur, substantially as and for the purposes set forth.

2. A sash-pulley case having formed on its sides angular swellngs, its 'front orfaceedges curved to form a series of arcs of circles, each arc being provided with a marking-spur located centrally thereof, the apexes of the angular swellings projecting outwardly beyond the curved lines of ;the face-plate, substantiall y as and for the purposes set forth.

3.' A sash-pulley case havingits rearwardlyextending pulley-supporting fianges beveled on their rcar edges from -their inner to their outer surfaces, forming acute angles at their rear outer edges to serve as chisels, substantially as set forth.

'S EPHE PALMEB- Wi tn esses:

WM. G. PAL ER, GEO. C. MA DE 

